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A kind of transparent silane-modified nano-montmorillonite dispersion liquid and its preparation method and application

A nano-montmorillonite, silane modification technology, applied in the direction of dyeing organosilicon compound treatment, fibrous filler, etc., can solve the problems of transparent non-water organic medium dispersion system report, application range and performance limitation, etc., to achieve operation The effect of easy, high production efficiency and simple reaction process

Active Publication Date: 2020-01-31
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, for silane-modified montmorillonite, its dispersion is often opaque, and there is no report on a transparent non-aqueous organic medium dispersion system. The opaque montmorillonite dispersion has serious implications for its application range and performance. limits

Method used

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  • A kind of transparent silane-modified nano-montmorillonite dispersion liquid and its preparation method and application
  • A kind of transparent silane-modified nano-montmorillonite dispersion liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1.0 g of aqueous montmorillonite (clay) was added to 500 ml of deionized water while stirring to prepare a 0.2 wt % montmorillonite aqueous solution. Measure 0.15g of N-(2-aminoethyl)-isobutylmethyldimethoxysilane (molar mass: 220g / mol), add 15ml of methanol dropwise under stirring at room temperature to form a silane solution, mix well and then add dropwise 0.0012g deionized water, stirred at room temperature for 2h. Add the hydrolyzed N-(2-aminoethyl)-isobutylmethyldimethoxysilane dropwise to 0.2wt% montmorillonite aqueous solution with stirring at room temperature, stir for 1 hour, then start distillation, and slowly raise the temperature Add 2000ml of toluene dropwise while stirring during the high temperature process. During the heating process, there is no fraction until the temperature reaches 115°C. Distill until there is no fraction (about 4-5h), and the sample after removing the solvent (toluene, methanol, water) is obtained, and then The remaining solvent wa...

Embodiment 2

[0069]1.0 g of aqueous montmorillonite (clay) was added to 100 ml of deionized water while stirring to prepare a 1 wt % montmorillonite aqueous solution. Measure 6g of N-(2-aminoethyl)-isobutylmethyldimethoxysilane (molar mass: 220g / mol), add 6ml of ethanol dropwise under stirring at room temperature to form a silane solution, mix well and then add dropwise 0.98 g deionized water, stirred at room temperature for 2h. Add the hydrolyzed N-(2-aminoethyl)-isobutylmethyldimethoxysilane dropwise to 0.2wt% montmorillonite aqueous solution with stirring at room temperature, stir for 1 hour, then start distillation, and slowly raise the temperature Add 220ml of toluene dropwise while stirring during the high process, there is no fraction until the temperature reaches 115°C during the heating process, distill until there is no fraction (about 4-5h), and obtain the sample after removing the solvent (toluene, ethanol, water), and then The remaining solvent was completely removed by rotar...

Embodiment 3

[0071] 1.0 g of aqueous montmorillonite (clay) was added to 10 ml of deionized water while stirring to prepare a 10 wt % montmorillonite aqueous solution. Measure N-(2-aminoethyl)-isobutylmethyldimethoxysilane (molar mass is 220g / mol) 1g, N-(2-aminoethyl)-aminopropyltrimethoxysilane (molar mass (204g / mol) 1g, 15ml of methanol was added dropwise with stirring at room temperature to form a silane solution, after mixing, 6g of deionized water was added dropwise, and stirred at room temperature for 2h. Add the hydrolyzed N-(2-aminoethyl)-isobutylmethyldimethoxysilane and N-(2-aminoethyl)-aminopropyltrimethoxysilane dropwise to 10wt% under stirring at room temperature In the montmorillonite aqueous solution, stir for 1 hour, then start to distill, and add 70ml of dichloroethane dropwise while stirring while the temperature is slowly rising, there is no distillate in the heating process until the temperature reaches 110°C, distill until there is no distillate (about 4 -5h), obtain ...

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Abstract

The invention provides transparent silane-modified nano-montmorillonite dispersion as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) preparation of silane hydrolysate, namely mixing a silane solution and water, and preparing the silane hydrolysate; 2) dispersing nano-montmorillonite into water to form a transparent dispersion system while stirring; 3) adding the silane hydrolysate prepared in the step 1) into the dispersion system prepared in the step 2), adding azeotropic solvents in batches, and distilling off azeotrope of the organic solvent, water and azeotropic solvents; and when no azeotrope is distilled off, optionally removing partial or total of residual solvents so as to obtain paste; and 4) dropwise adding the silane solution into the paste prepared in the step 3), thereby obtaining the transparent silane-modified nano-montmorillonite dispersion. The silane-modified nano-montmorillonite dispersion can be appliedto optical materials. For example, the material is applied to LED packaging materials.

Description

technical field [0001] The invention belongs to the technical field of silane-modified nano-montmorillonite, and in particular relates to a transparent silane-modified nano-montmorillonite dispersion and its preparation method and application. Background technique [0002] Montmorillonite is a kind of clay with layered aluminosilicate structure. Montmorillonite has the characteristics of large interlayer cation exchange capacity, high interlayer charge, large diameter-thickness ratio and specific surface area of ​​the sheet, and has a wide range of applications in polymer modification, cosmetics, pharmaceuticals, catalysis, and coatings. [0003] The unit cell of montmorillonite is composed of two layers of silicon-oxygen tetrahedron with a layer of aluminum-oxygen octahedron in between, and the interlayer spacing is about 1nm. The tetravalent silicon in the silicon-oxygen tetrahedron and the trivalent aluminum in the aluminum-oxygen octahedron in the montmorillonite unit c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/42C09C3/12
CPCC01P2006/60C09C1/42C09C3/12
Inventor 马永梅李晓曹新宇尚欣欣庄亚芳郑鲲张京楠
Owner INST OF CHEM CHINESE ACAD OF SCI
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